The SeisGram2K Seismogram Viewer is a Java program for interactive viewing of earthquake seismogram traces locally or over the Internet.
SeisGram2K displays one or more sets of single trace or 3-component seismograms. The viewer supports: zooming, scaling and transformation of the seismograms; rotation of horizontal component traces; time and amplitude picking; animated, 3D particle motion display; time-domain integration and differentiation; interactive spectral and spectrogram displays; frequency-domain filtering, instrument removal and other processing; and much more.
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SeisGram2K is written in the Java language. SeisGram2K is available:
(1) as a stand-alone application (SeisGram2K) that runs locally and which can read data files locally or across the Internet.
SeisGram2K stand-alone will run on any type of computer which has the latest version of Java installed.
(2) as an "applet" (SeisGram2KApp) that runs over the Internet from within an HTML web page.
SeisGram2K "applet" can be used from any type of computer with Internet access, a recent web browser, and the latest version of Java installed.
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SeisGram2K can be run in a "SCHOOL" mode which includes only a limited sub-set of program options. Use the program argument -mode=SCHOOL to activate this mode. Use the program argument -mode.expert=YES to enable school expert mode with additional viewing and travel-time analysis options
Program options indicated with (*) are not available on the SCHOOL mode of SeisGram2K.
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SeisGram2K displays trace channels in one or more "trace-group" windows. Each trace-group window displays all of its traces with identical time and amplitude scales.
The time base for all trace-group windows can be aligned with the View->AlignTo menu item, and locked in alignment with the View->LockAlignment menu item or with the program argument -display.lockalignment=YES
Most viewing and processing operations act on all traces in a trace-group. A trace-group may contain one or more channels from one or more stations or instruments. For trace-groups containing an orthogonal, three-component set of channels from a unique site, the rotation of horizontal components, an animated particle motion view, and a set of multi-component analysis tools are available.
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For more information see: http://www.alomax.net/seisgram
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